X-T1 goes to Beach...

Started Apr 24, 2014 | Discussions thread
OP Evan Effa Veteran Member • Posts: 3,342
Re: DR expansion Modes in RAW

Luego wrote:

Evan Effa wrote:

Luego wrote:

Pleasant images... and you shot RAW.

Question: "Why did you use ISO 400 and ISO 800 during daylight?"



Good question Luego,

I was using variants of the Auto ISO & Auto Dynamic Range settings. (Something quite new to me as my Canon Bodies are a little older & don't even have Auto ISO) Some of these scenes were fairly intense with deep blacks & vivid highlights, i.e. Wide DR so the camera was choosing the DR 200 & 400 Settings. This necessitates a higher ISO by design.

The camera handled this pretty well I think as recovering the highlights and shadows seems pretty straightforward in Post with very little noise.

(I was using LR 5.4 &/or Capture One interchangeably for these images...)


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Thanks for your explanation , Evan.

You realize that DR Auto is an aid for JPEG shooters and if you shoot RAW the same can be accomplished with the EC dial. This way you can shoot base ISO 200 and have the full DR range at your disposal in PP.



I'm not sure about this question of DR expansion. I don't think that it just applies to jpeg shooters.

From the DP review: ( http://www.dpreview.com/reviews/fujifilm-x-t1/15 )

It's tempting to think of DR settings as being most relevant for JPEG shooters, but they apply equally to Raw capture. As usual, it's possible to recover highlight detail that's lost in the camera's JPEGs even at DR100, but there's potentially an extra stop of fully-recoverable highlight data at DR200, and two stops in a DR400 file. This does depend on the dynamic range of the scene and the camera's metering, though; often DR 200 will retain all of the useful highlight data.

Both Adobe Camera Raw and Capture One recognise the DR mode tags in the Raw files, so render their output at the correct brightness, but neither applies the different tone curves necessary to incorporate any additional highlight information. This means so you'll need to manually adjust DR200 and 400 images to get the full benefit.

...Because there's so little penalty to shooting at DR200, and it can frequently be beneficial in real-world images, we're generally inclined to leave it set by default. Then whenever the ISO is set to 400 or higher, the camera will retain this additional highlight detail all the time. We generally wouldn't recommend JPEG users shoot at DR400 unless it's absolutely necessary, because most of the time you end up with a slightly flat-looking file, but little practical benefit in terms of highlight detail. However for Raw shooters wishing to retain the best possible options for highlight recovery, there's really no penalty to using the DR400 setting.

I have been doing a bit of experimentation and the DR200 & DR400 settings.  These settings do seem to provide more headroom and shadow recovery compared to the Base ISO 200 setting... even when shooting RAW.  I'm not totally sure as to how much effect there is or whether it is a bit of gimmickry; but, I note that DPR in its review said something to the effect that they are experimenting with this question & will report back.


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